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投稿时间：2015-03-18 修订日期：2015-03-23 录用日期：2015-03-27 网络发布日期：2015-09-18
投稿时间：2015-03-18 修订日期：2015-03-23 录用日期：2015-03-27 网络发布日期：2015-09-18
中文摘要: 以甲醛和铁粉为还原剂在硫酸溶液中协同还原氧化锰矿，考察了还原剂用量、硫酸体积分数、浸出时间、浸出温度、液固比和搅拌速率对锰浸出率、浸出液中铁和甲酸的质量浓度的影响，并用响应面法设计优化试验。结果表明，在硫酸的体积分数为15%、甲醛用量为理论量的90%、甲醛和铁的摩尔比为2、二者浸出时间之比为2、总浸出时间2.93 h、浸出温度85 ℃、液固比6、转速150 r/min的条件下，锰浸出率达98.04%，浸出液中铁和甲酸的质量浓度分别为13.96 mg/mL、1.40 mg/mL。
Abstract:Manganese oxide ores were synergic reductive leached in sulfuric acid medium with formaldehyde and iron powder as reductant. The effects of reductant dosage, volume fraction of sulfuric acid, reaction time, leaching temperature, ratio of liquid to solid (L/S), and stirring rate on manganese extraction rate, mass concentrations of iron and formic acid in lixivium were studied. Technology parameters were optimized by response surface methodology. The results show that manganese leaching rate is 98.04%, and mass concentrations of iron and formic acid in lixivium is 13.96 mg/mL and 1.40 mg/mL respectively under the optimum conditions including volume fraction of sulfuric acid of 15%, 90% of theoretical amount of formaldehyde, CH2O/Fe mole ratio of 2, reaction time ratio of 2, total leaching time of 2.93 h, leaching temperature of 85 ℃, L/S=6, and stirring rate of 150 r/min.
文章编号： 中图分类号：TF803.2 文献标志码：
基金项目:广西高校锰深加工科技创新平台项目(GJXQ2013)；广西民族大学研究生教育创新计划项目(GXUN-CHX2014092)
引用文本：
卢友志,马华菊,陈东莲,明宪权,李维健,袁爱群,韦冬萍,唐雅芳.甲醛和铁粉协同还原浸出低品位氧化锰矿[J].有色金属（冶炼部分）,2015(10):25-29.
LU You-zhi,MA Hua-ju,CHEN Dong-lian,MING Xian-quan,LI Wei-jian,YUAN Ai-qun,WEI Dong-ping,TNAG Ya-fang.Synergic Reductive Leaching of Manganese from Low-grade Oxide Manganese Ore with Formaldehyde and Iron Powder[J].Nonferrous Metals (Extractive Metallurgy),2015(10):25-29.
卢友志,马华菊,陈东莲,明宪权,李维健,袁爱群,韦冬萍,唐雅芳.甲醛和铁粉协同还原浸出低品位氧化锰矿[J].有色金属（冶炼部分）,2015(10):25-29.
LU You-zhi,MA Hua-ju,CHEN Dong-lian,MING Xian-quan,LI Wei-jian,YUAN Ai-qun,WEI Dong-ping,TNAG Ya-fang.Synergic Reductive Leaching of Manganese from Low-grade Oxide Manganese Ore with Formaldehyde and Iron Powder[J].Nonferrous Metals (Extractive Metallurgy),2015(10):25-29.
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